非洲地区采购需求：螺栓、螺母、垫圈、膨胀锚栓、螺纹杆和螺柱、螺钉

I'm looking to source 30,000 pieces of nylock nuts made from mild steel and featuring a zinc coating for enhanced corrosion resistance. It's essential that these components meet industry quality standards, as they'll be used in various assembly applications. Could you please provide your best pricing and lead time for this order? Additionally, I'd appreciate it if you could share any relevant product specifications and certifications that ensure the quality of the nylocks. Looking forward to your prompt response so we can move forward quickly.